MOM'S DRUG SCANDAL CLOUDS SELENA'S BIG DAY

FRUSTRATED bridezilla Selena Gomez is dealing with another crisis as she tries to plan her dream wedding to Benny Blanco — her mother's involvement in a messy drug scandal, sources tell The National ENQUIRER.

- 

Gomez and fiancé Benny Blanco are reportedly tying the knot soon

Selena's mom, Mandy Teefey, 49, who cofounded the mental-health startup Wondermind with her 33-year-old daughter, has been accused by a former staffer of snorting the ADHD drug Ritalin in the company's West Hollywood office, which Mandy denies.

“These accusations are devastating,” spills an insider. “Selena is extremely close to her mom, so as you can imagine this has thrown her for a real loop.”